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Updated: Aug 2, 2025

Trans-Tympanic Drug Delivery for the Treatment of Ototoxicity
Published on: March 16, 2018
Mitochondrial redox system: A key target of antioxidant therapy to prevent acquired sensorineural hearing loss
Jeong-In Baek1, Ye-Ri Kim2,3, Kyu-Yup Lee4
1Department of Companion Animal Health, College of Rehabilitation and Health, Daegu Haany University, Gyeongsan, Republic of Korea.
Abstract:
Noise (noise-induced hearing loss), and ototoxic drugs (drug-induced ototoxicity), and aging (age-related hearing loss) are the major environmental factors that lead to acquired sensorineural hearing loss. So far, there have been numerous efforts to develop protective or therapeutic agents for acquired hearing loss by investigating the pathological mechanisms of each types of hearing loss, especially in cochlear hair cells and auditory nerves. Although there is still a lack of information on the underlying mechanisms of redox homeostasis and molecular redox networks in hair cells, an imbalance in mitochondrial reactive oxygen species (ROS) levels that enhance oxidative stress has been suggested as a key pathological factor eventually causing acquired sensorineural hearing loss. Thus, various types of antioxidants have been investigated for their abilities to support auditory cells in maintenance of the hearing function against ototoxic stimuli. In this review, we will discuss the scientific possibility of developing drugs that target particular key elements of the mitochondrial redox network in prevention or treatment of noise- and ototoxic drug-induced hearing loss.
Insights
Protecting hearing from noise and drugs involves understanding oxidative stress. This review explores targeting mitochondrial redox networks to prevent or treat acquired sensorineural hearing loss.
Area of Science:
- Oto-pharmacology
- Neuroscience
- Cellular Biology
Background:
- Acquired sensorineural hearing loss stems from noise, ototoxic drugs, and aging.
- Oxidative stress, particularly mitochondrial reactive oxygen species (ROS) imbalance, is a key factor in hearing loss.
- Current research focuses on protecting cochlear hair cells and auditory nerves.
Purpose of the Study:
- To review the potential of targeting mitochondrial redox networks for hearing loss prevention and treatment.
- To explore therapeutic strategies against noise- and drug-induced ototoxicity.
- To highlight the role of antioxidants in maintaining hearing function.
Main Methods:
- Literature review of pathological mechanisms in acquired hearing loss.
- Analysis of the role of mitochondrial redox homeostasis in auditory cells.
- Investigation of antioxidant strategies against ototoxic stimuli.
Main Results:
- Mitochondrial ROS imbalance is implicated in acquired sensorineural hearing loss.
- Antioxidants show promise in supporting auditory cell function.
- Targeting specific elements of the mitochondrial redox network is a viable therapeutic avenue.
Conclusions:
- Developing drugs targeting the mitochondrial redox network offers a promising strategy for preventing and treating noise- and ototoxic drug-induced hearing loss.
- Further research into redox homeostasis in hair cells is crucial.
- Antioxidant therapies hold potential for preserving hearing function.
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